...Wilbert A. McClay Email1: mcclay.w@husky.neu.edu Email2: wilmcclay@gmail.com Homeland Security Radiographic Image Analysis Project Image Analysis of Radiographic Scans for Detection of Threats in Cargo Containers Motivation The current standard methods for examining containers that pose a potential terrorist threat involve Department of Homeland Security (DHS) officers generally conducting either non-intrusive or physical inspections. The non-intrusive inspection (NII) involves use of X-ray or gamma ray scanners to generate an image of the contents, which DHS officers review for anomalies. DHS officers also scan cargo using radiation detection devices. When an irregularity is identified, officers may physically examine all or a portion of the container’s contents (see Figure 1 below). [pic] Figure 1: Cargo container being examined by portable VACIS system. Problem Importance The methods implemented will enable the identification and evaluation of cargo radiographic images having an extremely widespread and powerful impact for Homeland Security. Project Description Radiographic imaging has become an important tool for screening cargo containers for potential nuclear or radiological threats. We are investigating methods to extract features from these images that effectively characterize the contents and when combined with other measurements and information could indicate whether or not a threat is present. Analysis...
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...students in the class, keeping their ID, name and phone number • You’d probably come up with something like this: p y p g ID xx yy Name Mike Mik Elisa Phone 111 222 • This is the basic structure of the relational model, a table or relation 6 Extra Assumptions • You would not repeat the same row twice • No two rows have the same ID, but they may have the same name and phone number p ID xx yy Name Mike Mik Elisa Phone 111 222 • ID would be the PRIMARY KEY (PK). 7 Now add emails … (many!) • Now you need to add the emails of each student, but you do not know how many emails • Can you come up with a solution? Try it … y p y 8 Many Fields y • Could come up with something like this ID xx yy Name Mike Elisa Phone 111 222 Email1 bad bad Email2 idea idea • Above would not work very well. How many fields? – Wasted space – What if a student has more emails? – How to process it in my program? 9 Un normalized Un-normalized • Could also try this: ID xx xx yy Name Mike Mike Elisa...
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